[Bug 1848856] Re: Upgrade from 19.04 to 19.10 with zfs on root fails with grub syntax error
Jean-Baptiste Lallement
jean-baptiste.lallement at ubuntu.com
Wed Nov 13 12:22:47 UTC 2019
Actually I think '\r' is a red herring. The problem is that if several
devices are used for a pool (raid, log or cache) grub-probe returns
several lines. Several are not handled properly when we generate the
line of metadata used to create the menu. The patch is to take the first
device returned by grub-probe.
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https://bugs.launchpad.net/bugs/1848856
Title:
Upgrade from 19.04 to 19.10 with zfs on root fails with grub syntax
error
Status in grub2 package in Ubuntu:
Triaged
Status in grub2 source package in Focal:
Triaged
Bug description:
At the end of the upgrade from 19.04 to 19.10, the post process of the
update-grub reports:
Syntax error at line 185
Syntax errors are detected in generated GRUB config file.
Ensure that there are no errors in /etc/default/grub
and /etc/grub.d/* files or please file a bug report with
/boot/grub/grub.cfg.new file attached.
run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1
dpkg: error processing package linux-image-5.3.0-18-generic (--configure):
installed linux-image-5.3.0-18-generic package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
friendly-recovery
grub-efi-amd64
grub-efi
grub-efi-amd64-signed
shim-signed
linux-image-5.3.0-18-generic
The system used https://github.com/zfsonlinux/zfs/wiki/Ubuntu-18.04
-Root-on-ZFS to add zfs on root to a 19.04 system.
The syntax error in grub.cfg.new is an extra } on line 185. However,
comparing the grub.cfg.new to the previously generated grub.cfg under
19.04, there is a significant quantity of configuration missing.
Manually running update-grub generates the same error.
/etc/default/grub is the only file changed from default installation
to include zswap. This file was not changed prior to upgrade.
The error is reported during the processing of
/etc/grub.d/10_linux_zfs which is dated October 11. I attempted the
upgrade on 10/18 and have done multiple updates to get the latest
kernel and remove old kernels prior to the upgrade. So, I believe the
problem is with one of the upgrade modules.
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